You are Looking at a Vintage Towncraft shirt.  Grades at a 5/10, perfectly aged/worn, soft , thin, distressed, see pics.  The tag says size Small, may fit smaller(Depending on how tight/loose you wear your clothes)....Read Measurements(compare them to a piece you own and you will get an idea of how it might fit)....My actual measurements are as follows.  Top to bottom,27".  Across the chest, from pit to pit,20".